package jdbc;
/**
 * 执行关联查询
 */
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class JDBCDemo5 {
    public static void main(String[] args) {

        try (
                Connection connection = DBUtil.getConnection();
        ){
            Statement statement = connection.createStatement();
            String sql = "SELECT t.name,t.salary,t.title,c.name,c.floor " +
                    "FROM teacher t " +
                    "JOIN class c ON t.id=c.teacher_id " +
                    "WHERE t.name='王克晶'";
            System.out.println(sql);
            ResultSet rs = statement.executeQuery(sql);
            while (rs.next()){
                //String tName = rs.getString("t.name");
                //int tSalary = rs.getInt("t.salary");
                //String tTitle = rs.getString("t.title");
                //String cName = rs.getString("c.name");
                //int cFloor = rs.getInt("c.floor");
                //获取字段值时可以使用字段索引，注意:从1开始为结果集第一个字段。可读性差，不推荐
                String tName = rs.getString(1);
                int tSalary = rs.getInt(2);
                String tTitle = rs.getString(3);
                String cName = rs.getString(4);
                int cFloor = rs.getInt(5);
                System.out.println( tName+" "+tSalary+" "+tTitle+" "+cName+" "+cFloor);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

